Replacce pragma once with ifndef

src/grid/GridData.h

@@ -1,5 +1,5 @@
-#pragma once
-
+#ifndef GRIDDATA_H
+#define GRIDDATA_H
 #include <string>
 #include <vector>
 #include <map>
@@ -23,3 +23,4 @@ namespace platform {
         std::map<std::string, json> grid;
     };
 } /* namespace platform */
+#endif

src/grid/GridSearch.h

@@ -1,5 +1,5 @@
-#pragma once
-
+#ifndef GRIDSEARCH_H
+#define GRIDSEARCH_H
 #include <string>
 #include <map>
 #include <mpi.h>
@@ -57,3 +57,4 @@ namespace platform {
         Timer timer; // used to measure the time of the whole process
     };
 } /* namespace platform */
+#endif